I pre-ordered the "Limited Color" last night from LITA, and it looks like all of their pre-order stock already sold out soon after. But the "Clear" is still available (right now at least) to pre-order from them. These should ship on 5/5 through them.

I hope people are buying the Blu-ray of SPM, if they at least want those sequels to come out on Blu-ray. Waiting around for it to go on sale for a few bucks cheaper won't help the sales figures out any.